狄、發明說明·· 【發明所屬之技術領域】 本發明係一種關於具備能每 之溫痄从、丨 匕貝仃過熱保護及過電流保言j 之处度檢測電路之換流器電路裝置。 【先前技術】 以下參照第6圖簡單的說明且 哭雷玫壯32 /、備/皿度檢測電路之換流 口口电路裝置及其控制電路之動作。 設定3電腦或膽構成之控制電路1輸出應於旋轉速度 由=奴頻率的基準訊號至驅動電路2。該基準訊號為 ^ 衝幅調變之矩形波，及 、於该等經脈衝幅調變之短形波一 個短形波形成。 “18。度延遲之三 麫出/、有1 2〇度相位差之二個經脈衝幅調變之矩形波為 驅動電路2輸入於構成換流哭雷 乂兴爪⑽电路之上側臂之開關元 斷。、Q2、Q3之控制電極以控制該開關元件之導通/遮 正、又相對於上述經脈衝波幅1周變之矩形㈣180度相位 ^遲後之經脈衝幅調變之矩形波，亦同樣經由驅動電路2 以控制下側臂之開關元件q4、q5、q6。 而連接於開關元件Q1、q2、q3、q4、Q5、之二 極體D1、D2、D3、D4、D5、D6為再生二極體。 因而由於各擁有120度相位差之三個經脈衝幅調變之 矩形波及對於該經脈衝幅調變之矩形波施以各丨度相位 延遲之三個經脈衝幅調變的矩形波之導通/遮斷控制，使換 314789 6 流器電路之輸出端子即由開關元件Q 1與Q4，開關元件Q2 與Q5，開關元件Q3與Q6之連接點U、V、W可得三相之 經脈衝幅調變之電壓，並使流通於馬達Μ之負荷電流為近 似於正弦波。 對於上述之換流器電路，於應用上有必要應於溫度以 變化馬達Μ之旋轉速度，或於溫度上升至必要以上時， 有必要停止換流器電路之動作以免其受損。因此設置溫度 檢測電路3，以檢測換流器電路之異常溫度上升，然後將 檢測之加熱異常訊號施加於控制電路，由以停止前述馬達 Μ。 【發明内容】 [發明所欲解決的課題] 隨著換流器電路之溫度變化，欲將前述溫度檢測電路 檢測之溫度檢測訊號施加於控制電路時，需於控制電路設 置專用之端子，因此增加控制電路之端子數。 又於換流器電路之溫度上升至預定溫度以上即發生過 熱時，為要防止電路元件受損壞，不但需要控制流通於開 關電路等的電流，亦有停止前述換流器電路之動作的必 要。 又如弟7圖所不，於㈤述溫度檢測電路3為要檢測溫 度而使用熱敏電阻（thermistor)3a。習用上換流器電路為裝 設在印刷基板4，前述熱敏電阻3 a為裝設在安裝換流器電 路之放熱板5。因此未能正確的檢測換流器電路之溫度上 升，又佔據空間。 7 314789 [解決課題之手段] 本發明提供能實行過熱保護及過電流保護之換流器電 路裝置，其換流器電路具備有：以複數之開關元件形成之 開關電路，用以驅動前述開關元件之驅動電路，以及於發 生異常之過電流時使前述驅動電路停止驅動並輸出異常訊 號之保護電路所構成，又於上述換流器電路設有檢測換流 器電路之溫度變化之具有溫度檢測元件之溫度檢測電路， 該溫度檢測電路中有對應於前述換流器電路之溫度變化而 變化之溫度檢測訊號之輸出與前述保護電路之異常訊號之 輸出為共用之同一端子。 本發明提供換流器電路裝置，其換流器電路係具備 有：以複數之開關元件形成之開關電路，用於驅動前述開 關元件之驅動電路，以及於發生過電流的異常時使前述驅 動電路停止驅動並輸出異常訊號之保護電路，又於上述換 流器電路設有檢測前述換流器電路之具有溫度檢測元件之 溫度檢測電路，由該溫度檢測電路將應於前述換流器電路 之溫度變化而變化之溫度檢測訊號施加於控制電路以應於 溫度變化而變化流通於換流器電路之電流，並於前述換流 器電路之溫度上升至預定溫度以上時將過熱保護電路之過 熱異常訊號施加於前述控制電路及驅動電路，由以停止換 流器電路之動作。 【實施方式】 笫1圖表不具備本發明之溫度檢測電路之換流器電路 裝置之方塊圖。 8 314789 1221350 本發明之換流器電且 〇9 〇. ^ 路，、備有··上側臂之開關元件Q1、 Q2、Q3及下側臂之 9 1心山 開關兀件Q4、仍、Q6所構成之開關 電路9，其輸出為輪 „ ^ ; σ開關兀件之控制電極以控制各 開關兀件之V通/遮斷 Λ ^ - -+- ΙΓ 驅動电路2，以及產生控制訊號輸 入方;則述驅動電路2之控制電路卜 前述開關電路9之η的_ 一之開關兀件Q1與Q4、開關元件Q2 14 Q5、開關元件Q3愈π<ς ± αΑ 、 ^ 一 Q之連接點U、V、w為連接於馬 達Μ專的負荷。控制電二 甩峻i %出如刖述之經脈衝幅調變之 矩形波於驅動電路2,用以控制開關電路9。 一本發明之特徵為控制電路1連接有溫度檢測電路10。 前述溫度檢測電路10用於檢測由控制電路i、驅動電路2、 開關電路9構成之拖、、: 舟取灸換机為電路之溫度變化，而為由連接於 電源"VDD之電阻11，芬 xtu vl 1及一立而為連接於前述電阻11並連接 於控㈣路i之FAULT端子之熱敏電阻12所形成。 對前述熱敏電阻12並聯有過電流保護用FET13之汲 極•源極電極。前述過電流保護用FET13之沒極電極為經 由二極體14連接於電源VDD，並與前述熱敏電阻12之一 端共同以FAULT端子連接於控制電路1。 前述過電流保護用FET13之閘極電極連接於檢測流於 電阻15之過電流之過電流檢測電路16。又前述過電流保 護用FET1 3如圖為組裝在前述驅動電路2，或設在前述溫 度檢測電路10亦可。 第2圖表示將用於備有溫度檢測電路之換流器電路裝 置之溫度檢測電路1 〇裝設在放熱兼用配線基板1 7之事設 314789 9 圖。前述放熱兼用配線基板17使用表面為氧化之 板。 於前述絕緣之放熱兼用配線基板17之表面佈施有印 刷配線’亚裝設有前述開關電路9之上側臂之開關元件 Q卜Q2、Q3,及下側臂之開關元件Q4、 電路2等。 别 前，熱敏電阻12之安裝最好盡量接近於放熱兼用配 泉基板17上之於動作時溫度將上升之開關電路9及驅㈣ 路2。然而依本發明由於其 + ^由於基板材為使射，其熱傳導性 义而土板溫度大致均勾’因此只要裝設在基板 關於其^置而能正確的檢測換流器之溫度。 … 由前述控制電路]& 輸出之各具有120度相位差之細脈 :;:=Γ、形波為經由驅動電路2輸入於構成上側臂之 y 1 Q2、Q3之控制電極以控制其導通/遮斷。 遲18=Γ制電路1之對前述經脈衝幅調變之矩形波經延 又相位後經脈衝幅調變之矩形波同樣經由驅 2以控制下側劈夕問Μ _ 路 之開關几件Q4、Q5、q6之導通/遮斷。 ^ 而叉到各具有120度相位差而經脈衝幅調變之二個 及對该經脈衝幅調變之矩形波各延遲18〇戶 二個經脈衝φ5 ▲田^ X相位之 9之輪出心…交之矩形波的導通/遮斷控制，使開關電路 @ ’即開關元件Q1與Q4、開關元件Q2 開關兀件qmQ6之連接，點υ、ν、W輸出有 1 電壓’由該電塵供給負荷電流於前述馬達M使 314789 10 馬達M旋轉後，開關元件Q1、Q2、Q3、Q4、Q5、 Q6及再生一極體D1、〇2、d3、D4、d5、D6等之溫度上 升日守，刖述放熱兼用配線基板1 7之溫度受到熱傳導而立即 上升。如弟3圖所示，放熱兼用配線基板17之溫度上升時， 熱敏電阻12之電阻值於25t時為1〇〇κΩ，而溫度上升至 125°C時其電阻值降低至約為2.8ΚΩ。 ^ 、第5圖所示之電路，設電阻11之電阻值為i 〇κ 電阻19之電阻值為51ΚΩ，而電源電壓為By， 則如第3、4圖所示，熱敏電阻12之溫度檢測訊號v(ITRIp) 於25 C時約為〇·7ν，而於125。。時變成約為（π。 允如上述變化之溫度檢測訊號為由fault端子施加於 控制電路1，由前述控制電路丨控制經脈衝幅調變之矩形 、由以使馬達M流通應於溫度變化之馬達電流而控制其 旋轉數。 〃 口第3圖及第4圖所示，隨放熱兼用配線基板17 之溫度（Te)的上升，V(腦P)電壓上升時，當該電壓超過 设定之Vref電壓，則比較器20之輪出反轉，FAULT端子 變成低α。）準位。FAULT端子變成L。準位則控制電路工 將其2斷為發生異f ’於是停止驅動電路2之驅動，並且 切斷前述控制電路丨產生之經脈衝幅調變之矩形波，使馬 達停止動作而防止開關元件因加熱受到破壞。 +然而等於馬達M被鎖住的狀態，當驅動電路2及開關 電路9流有過電流時’流通電阻15之電流增加。當流通前 达電阻。之電流超過設定值以上時，由過電流檢測電路 314789 11 1221350 16輸出過電流檢測訊號。第i圖中，前述過電流檢測電路 16輸出之過電流檢測訊號為施加於過電流保護FETl3之 閘極。由此使前述過電流保護用FET13導通而使fault 端子成為L〇準位。 前述過電流保護FET13導通而輸出Lo準位之過電 異常訊號，於此為通過與輸出前述溫度檢測訊號相同之 FAULT端子傳送異常訊號至控制電路丨。由而切斷前述控 制電路1產生之經脈衝幅調變之矩形波，停止馬達m之動 作以防止開關元件之過電流破壞及馬達之故障等。 以下參照第5圖詳細說明具有溫度檢測電路之換流器 電路U之放熱兼用@己線基板之溫度達到言免定溫度以上 時，切斷流通前述馬達Μ之電流而達到過熱保護的動作。 如圖所示，前述溫度檢測電路1〇設有過熱檢測用之比較器 20，該比較器20之一輸入端子連接前述熱敏電阻，另 一端子施加有基準電壓Vref。 與前述同樣的，當換流器電路裝置之溫度上升時，熱 敏電阻12之電阻值降低’輸出溫度檢測訊號。前述溫斤 測訊號經由muP端子施加於控制電路丨，以”由皿^ 制電路W出之經脈衝幅調變之矩形波，使應於溫度二 之馬達電流流於馬達Μ，而依溫度以變化 ： 為相同。 < 功此則 士 工J示〉益度以上 呀，由熱敏電阻12檢測而施加於比較器2〇之一輪 前述溫度檢測訊號V(ITRIP)達到基 ⑥入鈿之 土 1 er以上時，則 314789 12 1221350 由比：器2 0之輪出端子產生過熱異常訊號T T。 别述過熱*常訊號ττ施加於控制電路1時，前述控 制電路1產生之脈彳蘇蚱％辟 巾田5周、交之矩形波被切斷，使馬達Μ之 動作停止以防止開關元件之過電流破壞及馬達故障等。 “ k匕屯机之電阻15為連接於過電流檢測電路 16，電阻19之—端施加以過電流檢測電路檢測之過電 流檢測訊號，即可金篦]岡 J /、弟1圖同樣的經由同一端子達過 流及過熱保護的功能。 < 屯 (發明之效果） 本毛明由於連接溫度檢測電路之溫度檢測元件及過電 流檢測元件，檢測之訊號為施加於控制電路之同—❾山 子，因此於控制電路不必分 而 刀別0又置端子或電路即能實施、、w 度檢測及過電流檢測。 她恤 又由於連接過熱保護訊號檢測電路於前述 路，於電路達到預定溫度以上時使其動作停止’因此= δ蒦因過熱致電路被破壞。 ’、 又由於開關電路及驅動電路為裝設在放熱兼 板上’㈣其熱傳達性良好，基板上溫度大致均勾的特性 亚可由熱敏電阻正確的檢測開關電路 於溫度變化控制供給於負荷的電流。 而-應 【圖式簡單說明】 第1圖表示備有本發明之、黑冷 裝置之說明用方塊圖。““測電路之換流器電路 第2圖表示本發明之溫度檢測電路裝設在放熱兼用配 314789 13 1221350 線基板之模型圖。 弟3圖表不備有本發明之溫度檢測電路之換流裔電路 所使用之熱敏電阻之溫度與電阻值及電壓之關係表。 弟4圖表不備有本發明之溫度檢測電路之換流裔電路 所使用之熱敏電阻之溫度與電阻值及電壓之關係特性圖。 第5圖表示備有本發明之溫度檢測電路之換流器裝置 之另一實施例方塊圖。 第6圖表示習用之換流器電路之說明用方塊圖。 笫7圖表不習用之換流為電路之溫度檢測電路裝設才旲 型圖。 1 控制電路 2 驅動電路 9 開關電路 10 溫度檢測電路 1卜 1 5、1 9電阻 12 熱敏電阻 13 過電流保護用FET 16 過電流檢測電路 17 放熱兼用配線基板 20 過熱檢測用及過電流保護用 比較器 D]、 D2、D3、D4、D5、D6 再生二極體 Q1、 Q2、Q3、Q4、Q5、Q6 開關元件 VDD 電源 14 314789D. Description of the invention ... [Technical field to which the invention belongs] The present invention relates to an inverter circuit device provided with a temperature detection circuit capable of over-temperature protection, over-temperature protection, and over-current protection. [Prior art] The following is a brief description with reference to FIG. 6 and the operation of the converter circuit device and the control circuit of the converter circuit. Setting 3 The output of the control circuit 1 composed of a computer or a gall should be driven from the reference signal of the slave frequency to the drive circuit 2. The reference signal is a rectangular wave modulated by the impulse amplitude, and a short shape wave formed from the pulse shaped modulated short wave. "18. Three-degree delay / two phase-pulse-modulated rectangular waves with a phase difference of 120 degrees are input to the drive circuit 2 and are switches on the side arms above the circuit forming the commutation circuit. The control electrodes of Q2 and Q3 are used to control the conduction / blocking of the switching element, and they are rectangular relative to the above-mentioned one-period pulse-varying rectangular ㈣ 180 ° phase ^ late pulse-modulated rectangular wave. Similarly, the driving elements 2 are used to control the switching elements q4, q5, and q6 of the lower arm. And the switching elements Q1, q2, q3, q4, Q5, and the diodes D1, D2, D3, D4, D5, and D6 are: Regeneration diodes. Therefore, each of the three pulse amplitude modulated rectangular waves having a phase difference of 120 degrees and the three pulse amplitude modulated rectangular waves with a phase delay of each degree are applied to the pulse amplitude modulated rectangular waves. The on / off control of the rectangular wave enables the output terminals of the 314789 6 current transformer circuit to be switched by the switching elements Q 1 and Q4, switching elements Q2 and Q5, and the connection points U, V, and W of the switching elements Q3 and Q6. The phase-adjusted voltage of the pulse amplitude makes the load current flowing through the motor M to be approximately positive For the above-mentioned inverter circuit, it is necessary to change the rotation speed of the motor M according to the temperature in the application, or when the temperature rises above the necessary, it is necessary to stop the operation of the inverter circuit to avoid damage. Therefore A temperature detection circuit 3 is provided to detect the abnormal temperature rise of the inverter circuit, and then the detected heating abnormal signal is applied to the control circuit to stop the aforementioned motor M. [Summary of the Invention] [Questions to be Solved by the Invention] With For the temperature change of the inverter circuit, if you want to apply the temperature detection signal detected by the temperature detection circuit to the control circuit, you need to set a dedicated terminal in the control circuit, so the number of terminals of the control circuit is increased. Also the temperature of the inverter circuit When overheating occurs when the temperature rises above a predetermined temperature, in order to prevent damage to the circuit components, it is necessary not only to control the current flowing in the switching circuit, etc., but also to stop the operation of the inverter circuit as described above. The temperature detection circuit 3 uses a thermistor 3a to detect the temperature. The inverter circuit is conventionally used. Installed on the printed circuit board 4, the aforesaid thermistor 3a is installed on the radiator plate 5 where the inverter circuit is installed. Therefore, the temperature rise of the inverter circuit cannot be detected correctly, and it takes up space. 7 314789 [Solution Means] The present invention provides an inverter circuit device capable of implementing overheating protection and overcurrent protection. The inverter circuit includes a switching circuit formed by a plurality of switching elements, a driving circuit for driving the switching elements, and When the abnormal overcurrent occurs, the aforementioned drive circuit stops driving and outputs an abnormal signal, and the inverter circuit is provided with a temperature detection circuit with a temperature detection element that detects the temperature change of the inverter circuit. The temperature detection circuit has the same terminal shared between the output of the temperature detection signal and the output of the abnormal signal of the protection circuit in accordance with the temperature change of the inverter circuit. The present invention provides an inverter circuit device. The inverter circuit is provided with a switching circuit formed by a plurality of switching elements, a driving circuit for driving the switching elements, and enabling the driving circuit when an abnormality occurs in an overcurrent. A protection circuit for stopping driving and outputting an abnormal signal, and a temperature detecting circuit having a temperature detecting element for detecting the foregoing inverter circuit is provided in the inverter circuit, and the temperature detecting circuit shall be at the temperature of the foregoing inverter circuit. The changing temperature detection signal is applied to the control circuit to change the current flowing in the inverter circuit in response to the temperature change, and an overheating abnormal signal of the overheat protection circuit when the temperature of the foregoing inverter circuit rises above a predetermined temperature. The control circuit and the driving circuit are applied to stop the operation of the inverter circuit. [Embodiment] 图表 1 The block diagram of the inverter circuit device without the temperature detection circuit of the present invention. 8 314789 1221350 The inverter of the present invention is electrically and 〇9 〇. ^ Circuit, equipped with a switching element Q1, Q2, Q3 of the upper side arm and 9 of the lower side arm Q4, still, Q6 The output of the formed switching circuit 9 is a wheel ^ ^; σ The control electrode of the switch element controls the V on / off of each switch element ^ ^--+-ΙΓ drive circuit 2 and generates a control signal input side ; Then the control circuit of the drive circuit 2 and the η of the switching circuit 9 described above- one of the switching elements Q1 and Q4, the switching element Q2 14 Q5, and the switching element Q3 are more π < ς ± αΑ, ^ a connection point U , V, w are the loads connected to the motor M. The control circuit 2 shakes i% to produce the rectangular wave with pulse amplitude modulation as described in the driving circuit 2 for controlling the switching circuit 9. A feature of the present invention A temperature detection circuit 10 is connected to the control circuit 1. The aforementioned temperature detection circuit 10 is used to detect the temperature change of the circuit composed of the control circuit i, the driving circuit 2, and the switching circuit 9: Connected to the power supply " VDD resistor 11, Fen xtu vl 1 and a stand-alone connection to the aforementioned power 11 and a thermistor 12 connected to the FAULT terminal of the control circuit i. The thermistor 12 is connected in parallel with the drain and source electrodes of the overcurrent protection FET13. The aforementioned overcurrent protection FET13 non-polar electrode It is connected to the power source VDD through the diode 14 and is connected to the control circuit 1 with the FAULT terminal together with one end of the thermistor 12. The gate electrode of the aforementioned overcurrent protection FET13 is connected to detect the overcurrent flowing in the resistor 15. The over-current detection circuit 16. The above-mentioned over-current protection FET 1 3 may be assembled in the drive circuit 2 or the temperature detection circuit 10 as shown in Fig. 2. Fig. 2 shows the replacement of the temperature detection circuit. The temperature detection circuit 10 of the current generator circuit device is installed on the heat-dissipating and wiring board 17 7 and 314789 9 Figure. The surface of the aforementioned heat-dissipating and wiring board 17 is an oxidized board. The surface of the aforementioned insulation and heat-dissipating and wiring board 17 The printed wiring is provided, and the switching elements Q2, Q3 of the upper arm of the above-mentioned switching circuit 9 and the switching elements Q4, circuit 2 of the lower arm are installed. Farewell, thermistor 12 It is best to install as close as possible to the switching circuit 9 and the drive circuit 2 on the heat-dissipating and dual-purpose spring substrate 17 whose temperature will rise during operation. However, according to the present invention, because of its thermal conductivity, the base plate is used for radiation. The temperature of the soil plate is almost uniform, so as long as it is installed on the substrate, it can accurately detect the temperature of the inverter.… By the aforementioned control circuit] & each of the output pulses has a phase difference of 120 degrees ::: = Γ, the shape wave is input to the control electrodes y 1 Q2 and Q3 constituting the upper arm via the driving circuit 2 to control the on / off thereof. Late 18 = Γ control circuit 1 of the aforementioned pulse amplitude modulated rectangular wave is delayed and phased, and the pulse amplitude modulated rectangular wave is also driven by drive 2 to control the lower side of the switch. Q_4 , Q5, q6 on / off. ^ Fork to two pulse amplitude modulated each with a 120 degree phase difference, and delay each of the pulsed modulated rectangular waves by 180. Two pulse pulses φ5 ▲ 田 ^ X phase 9 rotation The on / off control of the intersecting rectangular wave makes the switching circuit @ 'that is, the connection of the switching elements Q1 and Q4, the switching element Q2 and the switching element qmQ6, and the points υ, ν, and W output 1 voltage.' After the load current is supplied to the aforementioned motor M to rotate the 314789 10 motor M, the temperature of the switching elements Q1, Q2, Q3, Q4, Q5, Q6 and the regenerative poles D1, 02, d3, D4, d5, D6, etc. rises. It is said that the temperature of the exothermic wiring board 17 is immediately increased by the heat conduction. As shown in Figure 3, when the temperature of the exothermic wiring board 17 rises, the resistance value of the thermistor 12 is 100 kΩ at 25t, and the resistance value decreases to about 2.8 KΩ when the temperature rises to 125 ° C. . ^ For the circuit shown in Figure 5, the resistance value of resistor 11 is i 〇κ The resistance value of resistor 19 is 51KΩ and the power supply voltage is By, as shown in Figures 3 and 4, the temperature of the thermistor 12 The detection signal v (ITRIp) is about 0.7v at 25 C and 125. . The time change becomes approximately (π.) The temperature detection signal allowing the above-mentioned changes is applied to the control circuit 1 by the fault terminal, and the rectangular shape modulated by the pulse amplitude is controlled by the aforementioned control circuit, so that the flow of the motor M should be subject to the temperature change. The current is controlled by the motor current. As shown in Figure 3 and Figure 4, as the temperature (Te) of the heat-dissipation wiring board 17 rises, and the voltage of V (brain P) rises, when the voltage exceeds the set value Vref voltage, the output of the comparator 20 reverses, and the FAULT terminal becomes low α.). The FAULT terminal becomes L. At the level, the control circuit worker breaks it to 2 to generate a different f ', and then stops the driving of the driving circuit 2, and cuts off the rectangular wave modulated by the pulse amplitude generated by the aforementioned control circuit to stop the motor and prevent the switching element from being damaged. Heating is damaged. + However, it is equal to the state where the motor M is locked. When the drive circuit 2 and the switch circuit 9 have an overcurrent, the current flowing through the resistance 15 increases. When it reaches the flow resistance. When the current exceeds the set value, the overcurrent detection circuit 314789 11 1221350 16 outputs an overcurrent detection signal. In Fig. I, the overcurrent detection signal output from the overcurrent detection circuit 16 is a gate applied to the overcurrent protection FETl3. As a result, the over-current protection FET 13 is turned on, and the fault terminal is brought to the L0 level. The above-mentioned overcurrent protection FET 13 is turned on and outputs an over-current abnormal signal at the Lo level. Here, the abnormal signal is transmitted to the control circuit through the FAULT terminal which is the same as the temperature detection signal. As a result, the rectangular wave modulated by the pulse amplitude generated by the control circuit 1 is cut off, and the operation of the motor m is stopped to prevent overcurrent damage of the switching element and malfunction of the motor. The following describes in detail with reference to FIG. 5 the operation of the heat sink of the inverter circuit U having a temperature detection circuit @ 其 线 substrate when the temperature of the substrate reaches a certain temperature or more, the current flowing through the motor M is cut off to achieve overheating protection. As shown in the figure, the temperature detection circuit 10 is provided with a comparator 20 for overheat detection. One input terminal of the comparator 20 is connected to the thermistor, and the other terminal is applied with a reference voltage Vref. As in the foregoing, when the temperature of the inverter circuit device rises, the resistance value of the thermistor 12 decreases' and a temperature detection signal is output. The aforementioned temperature measurement signal is applied to the control circuit via the muP terminal, and the rectangular wave modulated by the pulse amplitude is generated by the circuit W, so that the motor current corresponding to the temperature two flows to the motor M, and the temperature depends on the temperature. The change is the same. ≪ The result is the same as the test result of the non-commissioned worker.> Above the profit, it is detected by the thermistor 12 and applied to the comparator 20 for one round of the aforementioned temperature detection signal V (ITRIP). When it is more than 1 er, 314789 12 1221350 generates overheating abnormal signal TT from the output terminal of the wheel: 0. Not to mention overheating * When the normal signal ττ is applied to the control circuit 1, the pulse generated by the aforementioned control circuit 1 After 5 weeks, the rectangular wave was cut off to stop the operation of the motor M to prevent the overcurrent damage of the switching element and the motor failure. "The resistance 15 of the k-tunnel machine is connected to the overcurrent detection circuit 16, the resistance The terminal of 19- is applied with the over-current detection signal detected by the over-current detection circuit, which can achieve the same function of over-current and over-temperature protection through the same terminal. < Tun (effect of the invention) Because this Maoming is connected to the temperature detection element and the overcurrent detection element of the temperature detection circuit, the detection signal is the same as that applied to the control circuit-Laoshanzi, so there is no need to separate the control circuit. Another terminal or circuit can be used to implement, w-degree detection and over-current detection. Because the overheat protection signal detection circuit is connected to the aforementioned circuit, the circuit stops its operation when the circuit reaches a predetermined temperature or higher. Therefore, the circuit is damaged due to overheating. 'Because the switch circuit and the drive circuit are installed on a heat sink and a board', its heat transfer is good, and the temperature on the substrate is almost uniform. The thermistor can correctly detect the switch circuit to control the temperature change and supply it to the load. Of current. And-should [Simplified description of the drawing] Fig. 1 shows a block diagram for explaining the black cooling device of the present invention. "" Converter circuit of test circuit "Fig. 2 shows a model diagram of the temperature detection circuit of the present invention installed on a heat-dissipating and dual-purpose 314789 13 1221350 line substrate. The chart in Figure 3 does not have a table showing the relationship between the temperature, resistance value, and voltage of the thermistor used in the temperature detection circuit of the present invention. The graph of Figure 4 does not include the relationship between the temperature, resistance value, and voltage of the thermistor used in the temperature detection circuit of the present invention. Fig. 5 is a block diagram showing another embodiment of the inverter device provided with the temperature detection circuit of the present invention. Fig. 6 is a block diagram for explaining a conventional inverter circuit.笫 7 The unfamiliar commutation is a circuit temperature detection circuit installation type diagram. 1 Control circuit 2 Drive circuit 9 Switch circuit 10 Temperature detection circuit 1 1 5、1 9 Resistor 12 Thermistor 13 FET for overcurrent protection 16 Overcurrent detection circuit 17 Wiring board for both heat release and overheat detection and overcurrent protection Comparator D], D2, D3, D4, D5, D6 Regenerative diodes Q1, Q2, Q3, Q4, Q5, Q6 Switching element VDD Power supply 14 314789